Gas-engine.



WITQEsses v I P. CALABRO.

GAS ENGINE.

APPLICATION FILED APR.24.1917.

Patented July 2, 1918.

2 SHEETS-SHEET 1.

INVENTOR ATTORN EY P. CALABROf GAS ENGINE.-

APPLICATION FILED APR.24, I917.

Patented July 2, 1918.

2 SHEETSSHEET 2.

PKZEWWZE ATTO R N EY PETER CALABRO, F ARLINGTON, NEW JERSEY.

GAS-ENGIN E.

Specification of Letters Patent.

Patented July 2, 1918.

Application filed April 24, 1917. Serial No. 164.229.

To all whom it may concern.

Be it knownthat I, PETER CALABRO, a citizen of the United States, residing at Arlington, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Gas-Engines, of which the following is a specification.

This invention relates to gas engines, and an object is to provide a construction comprising a cylinder or a plurality of cylinders each provided with a plunger which shall receive an impulse in both directions during the revolution of the crank shaft, in order that an engine including a given number of cylinders may have substantially double the capacity of an engine in which the explosive mixture is admitted on one side only of each plunger and at one end of the cylinder.

A further object is to provide improved valve mechanism which forms an essential feature of the construction and includes a plurality of rotary valves one of which is located in each end of the cylinder and which controls an inlet port and an exhaust port in said end of the cylinder.

A still further object is to provide valve mechanism of the character indicated in which the operation shall be etlicient at all times, in which silent running of the parts shall be realized and in which no packing for the valve proper shall be required.

In the accompanying drawings:

Figure 1 shows a two-cylinder engine in vertical section and constructed in accordance with my invention,

Fig. 2' is a side elevation,

Fig. 3 is a view of one of the cylinder heads, v

Fig. 4 shows one of the disk valves. and Fig. 5 is a transverse section through one of the cylinders and its'plunger.

The construction includes as many cylinders as may be required in building an engine of a given capacity, two of such cylinders being shown in the drawing. These cylinders may be connected with the crank shaft in the manner shown, the cranks being spaced at an angle of 180 degrees. The crank shaft is designatedlO, the cranks car ried thereby 12 and 14, and the pitmen connected with the cranks are shown at 15 and 16. Each pitman has connection with a pin 18 extending transversely through the piston or plunger 20, and said pin 18 passes through an aperture in a cross head 21 which operates in channels 22 and 23 in the walls of the cylinder. These channels are offset inwardly from the walls 24 of rectangular openings 25 in the cylinder walls. This construction eliminates friction and provides for the positive retention of the ele ments in their. proper operative relation.

The cylindersare designated 26 and 27 and are each provided with water 'jackets, the chambers of which are shown at 28. The wallsof the cylinder constituting the end portions of the bores are deflected or flared outwardly as shown at 30 and the rotary valve members 31 and 32 located respectively at opposite ends of the cylinder are positioned within these flared portions. The cylinder heads are desi nated 35 and 36 and they are provided with central bores 37 accommodating the stems. 38 and 39 of the respective valves. Each includes an inlet port 40 and an outlet port 41 through which the charge is admitted to the cylinders, said port communicating with end portions 42 and 43 of inlet and outlet ducts. The valves proper are of disk-like formation and are designated 31. these valves being provided with ports 46 designed to register successively with the ports of the cylinder head at. the proper interval. The edges of valve disk 31 are tapered to conform with the flared edges 30 of the cylin- I der walls at the ends thereof.

Each valve stem is provided with a gear 47 or 48 which gears mesh with gears 49 and 50 rigidly carried by shaft 51, the end of which shaft carries an additional gear wheel 52 of the beveled type meshing with the beveled gear 53 carried on crank shaft 10. The gears are proportioned to impart rotation to shaft 51 at a speed equivalent to one-half the speed of the crank shaft. Shaft 51 is mounted in bearings 54, 55 and 56 and collars 57 and 58 are provided for obviating the endwise thrust of the shaft. Each valve stem carries an adjusting nut 60 and a lock nut 61. I

In the operation of an engine constructed as herein described and provided with two cylinders and two plungers of the double acting type, the plungers being connected with the crank shaft at an angle of 180 degrees, two impulses will be im arted to the crank shaft during each revo ution of the latter. Other conditions being equal, the capacity of a two cylinder engine of this type will be double that of a two cylinder engine'in which the plungers receive the impulsive force of the explosion on one side only. Similar conditions will apply in connection with a four cylinder and a six cylinder engine-that is their capacity will be increased in each case by substantially 100?}.

Spark plugs 64 and 65 are suitably located and provide means for firing the charge introduced at each end of the cylindeis.

What is claimed. is

1. In an engine. a crank shaft, a plurality of cylinders outwardly flared at their ends, a plunger for each cylinder. said plungers being connected with the shaft at an angle of 180 degrees with reference to each other.

said cylinders each including a plurality of cylinder heads provided with an inlet port and an exhaust port. a valve comprising arotatable disk member substantially coextensive with the end of the bore of the cylinder. and having a port therein. a stem for said valve. said stem passing through the cylinder head along a line coincident with the main axis of the cylinder. a gear wheel carried by said stem. a second valve similarly mounted at the opposite end of the cylinder. a gear wheel'for driving said valve. and means for driving both of the gear wheels in timed relation to the crank shaft. the 'edge of the rotary valve being beveled for cooperation with the flared portion of the cylinder.

2. In an engine, a crank shaft. :1 cylinder the walls of which include chambers forming a water jacket. a plunger therein. a pin extending transverselythrough the plunger. a pitman connected with said pin and with the crank shaft. a cross head carried by the pin, the walls of the cylinder being provided with channels in alinement with the aforesaid chambers ,of the water jacket for the accommodation of thecross heads operating in alinement with said chambers and with an elongated opening permitting the movement of the pin through said wall during the reciprocation of the plunger, the plunger closing the elongated opening.

3. In an engine. a crank shaft. a cylinder connected therewith and provided with heads. each having an inlet and an outlet, port. the ends of the cylinder being flared,

a rotary valve at each end of the cylinder and provided with a port adapted to reg-' ister successively with the ports first named. means for firing a charge. means for rotating the valves from the crank shaft. said valves being substantially co-extensive with the ends of the bores of the cylinders, and

having beveled edges cooperating with the flared ends of the cylinders.

In testimony whereof I aflix my signature.

v PETER CALABRO, Witness J. DI SABATO. 

